/* $Id: mdoc_term.c,v 1.380 2020/04/06 10:16:17 schwarze Exp $ */
/*
 * Copyright (c) 2010, 2012-2020 Ingo Schwarze <schwarze@openbsd.org>
 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2013 Franco Fichtner <franco@lastsummer.de>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Plain text formatter for mdoc(7), used by mandoc(1)
 * for ASCII, UTF-8, PostScript, and PDF output.
 */
#include "config.h"

#include <sys/types.h>

#include <assert.h>
#include <ctype.h>
#include <limits.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "mandoc_aux.h"
#include "roff.h"
#include "mdoc.h"
#include "out.h"
#include "term.h"
#include "term_tag.h"
#include "main.h"

struct  termpair {
        struct termpair  *ppair;
        int               count;
};

#define DECL_ARGS struct termp *p, \
                  struct termpair *pair, \
                  const struct roff_meta *meta, \
                  struct roff_node *n

struct  mdoc_term_act {
        int     (*pre)(DECL_ARGS);
        void    (*post)(DECL_ARGS);
};

static  int       a2width(const struct termp *, const char *);

static  void      print_bvspace(struct termp *,
                        struct roff_node *, struct roff_node *);
static  void      print_mdoc_node(DECL_ARGS);
static  void      print_mdoc_nodelist(DECL_ARGS);
static  void      print_mdoc_head(struct termp *, const struct roff_meta *);
static  void      print_mdoc_foot(struct termp *, const struct roff_meta *);
static  void      synopsis_pre(struct termp *, struct roff_node *);

static  void      termp____post(DECL_ARGS);
static  void      termp__t_post(DECL_ARGS);
static  void      termp_bd_post(DECL_ARGS);
static  void      termp_bk_post(DECL_ARGS);
static  void      termp_bl_post(DECL_ARGS);
static  void      termp_eo_post(DECL_ARGS);
static  void      termp_fd_post(DECL_ARGS);
static  void      termp_fo_post(DECL_ARGS);
static  void      termp_in_post(DECL_ARGS);
static  void      termp_it_post(DECL_ARGS);
static  void      termp_lb_post(DECL_ARGS);
static  void      termp_nm_post(DECL_ARGS);
static  void      termp_pf_post(DECL_ARGS);
static  void      termp_quote_post(DECL_ARGS);
static  void      termp_sh_post(DECL_ARGS);
static  void      termp_ss_post(DECL_ARGS);
static  void      termp_xx_post(DECL_ARGS);

static  int       termp__a_pre(DECL_ARGS);
static  int       termp__t_pre(DECL_ARGS);
static  int       termp_abort_pre(DECL_ARGS);
static  int       termp_an_pre(DECL_ARGS);
static  int       termp_ap_pre(DECL_ARGS);
static  int       termp_bd_pre(DECL_ARGS);
static  int       termp_bf_pre(DECL_ARGS);
static  int       termp_bk_pre(DECL_ARGS);
static  int       termp_bl_pre(DECL_ARGS);
static  int       termp_bold_pre(DECL_ARGS);
static  int       termp_d1_pre(DECL_ARGS);
static  int       termp_eo_pre(DECL_ARGS);
static  int       termp_ex_pre(DECL_ARGS);
static  int       termp_fa_pre(DECL_ARGS);
static  int       termp_fd_pre(DECL_ARGS);
static  int       termp_fl_pre(DECL_ARGS);
static  int       termp_fn_pre(DECL_ARGS);
static  int       termp_fo_pre(DECL_ARGS);
static  int       termp_ft_pre(DECL_ARGS);
static  int       termp_in_pre(DECL_ARGS);
static  int       termp_it_pre(DECL_ARGS);
static  int       termp_li_pre(DECL_ARGS);
static  int       termp_lk_pre(DECL_ARGS);
static  int       termp_nd_pre(DECL_ARGS);
static  int       termp_nm_pre(DECL_ARGS);
static  int       termp_ns_pre(DECL_ARGS);
static  int       termp_quote_pre(DECL_ARGS);
static  int       termp_rs_pre(DECL_ARGS);
static  int       termp_sh_pre(DECL_ARGS);
static  int       termp_skip_pre(DECL_ARGS);
static  int       termp_sm_pre(DECL_ARGS);
static  int       termp_pp_pre(DECL_ARGS);
static  int       termp_ss_pre(DECL_ARGS);
static  int       termp_under_pre(DECL_ARGS);
static  int       termp_vt_pre(DECL_ARGS);
static  int       termp_xr_pre(DECL_ARGS);
static  int       termp_xx_pre(DECL_ARGS);

static const struct mdoc_term_act mdoc_term_acts[MDOC_MAX - MDOC_Dd] = {
        { NULL, NULL }, /* Dd */
        { NULL, NULL }, /* Dt */
        { NULL, NULL }, /* Os */
        { termp_sh_pre, termp_sh_post }, /* Sh */
        { termp_ss_pre, termp_ss_post }, /* Ss */
        { termp_pp_pre, NULL }, /* Pp */
        { termp_d1_pre, termp_bl_post }, /* D1 */
        { termp_d1_pre, termp_bl_post }, /* Dl */
        { termp_bd_pre, termp_bd_post }, /* Bd */
        { NULL, NULL }, /* Ed */
        { termp_bl_pre, termp_bl_post }, /* Bl */
        { NULL, NULL }, /* El */
        { termp_it_pre, termp_it_post }, /* It */
        { termp_under_pre, NULL }, /* Ad */
        { termp_an_pre, NULL }, /* An */
        { termp_ap_pre, NULL }, /* Ap */
        { termp_under_pre, NULL }, /* Ar */
        { termp_fd_pre, NULL }, /* Cd */
        { termp_bold_pre, NULL }, /* Cm */
        { termp_li_pre, NULL }, /* Dv */
        { NULL, NULL }, /* Er */
        { NULL, NULL }, /* Ev */
        { termp_ex_pre, NULL }, /* Ex */
        { termp_fa_pre, NULL }, /* Fa */
        { termp_fd_pre, termp_fd_post }, /* Fd */
        { termp_fl_pre, NULL }, /* Fl */
        { termp_fn_pre, NULL }, /* Fn */
        { termp_ft_pre, NULL }, /* Ft */
        { termp_bold_pre, NULL }, /* Ic */
        { termp_in_pre, termp_in_post }, /* In */
        { termp_li_pre, NULL }, /* Li */
        { termp_nd_pre, NULL }, /* Nd */
        { termp_nm_pre, termp_nm_post }, /* Nm */
        { termp_quote_pre, termp_quote_post }, /* Op */
        { termp_abort_pre, NULL }, /* Ot */
        { termp_under_pre, NULL }, /* Pa */
        { termp_ex_pre, NULL }, /* Rv */
        { NULL, NULL }, /* St */
        { termp_under_pre, NULL }, /* Va */
        { termp_vt_pre, NULL }, /* Vt */
        { termp_xr_pre, NULL }, /* Xr */
        { termp__a_pre, termp____post }, /* %A */
        { termp_under_pre, termp____post }, /* %B */
        { NULL, termp____post }, /* %D */
        { termp_under_pre, termp____post }, /* %I */
        { termp_under_pre, termp____post }, /* %J */
        { NULL, termp____post }, /* %N */
        { NULL, termp____post }, /* %O */
        { NULL, termp____post }, /* %P */
        { NULL, termp____post }, /* %R */
        { termp__t_pre, termp__t_post }, /* %T */
        { NULL, termp____post }, /* %V */
        { NULL, NULL }, /* Ac */
        { termp_quote_pre, termp_quote_post }, /* Ao */
        { termp_quote_pre, termp_quote_post }, /* Aq */
        { NULL, NULL }, /* At */
        { NULL, NULL }, /* Bc */
        { termp_bf_pre, NULL }, /* Bf */
        { termp_quote_pre, termp_quote_post }, /* Bo */
        { termp_quote_pre, termp_quote_post }, /* Bq */
        { termp_xx_pre, termp_xx_post }, /* Bsx */
        { NULL, NULL }, /* Bx */
        { termp_skip_pre, NULL }, /* Db */
        { NULL, NULL }, /* Dc */
        { termp_quote_pre, termp_quote_post }, /* Do */
        { termp_quote_pre, termp_quote_post }, /* Dq */
        { NULL, NULL }, /* Ec */ /* FIXME: no space */
        { NULL, NULL }, /* Ef */
        { termp_under_pre, NULL }, /* Em */
        { termp_eo_pre, termp_eo_post }, /* Eo */
        { termp_xx_pre, termp_xx_post }, /* Fx */
        { termp_bold_pre, NULL }, /* Ms */
        { termp_li_pre, NULL }, /* No */
        { termp_ns_pre, NULL }, /* Ns */
        { termp_xx_pre, termp_xx_post }, /* Nx */
        { termp_xx_pre, termp_xx_post }, /* Ox */
        { NULL, NULL }, /* Pc */
        { NULL, termp_pf_post }, /* Pf */
        { termp_quote_pre, termp_quote_post }, /* Po */
        { termp_quote_pre, termp_quote_post }, /* Pq */
        { NULL, NULL }, /* Qc */
        { termp_quote_pre, termp_quote_post }, /* Ql */
        { termp_quote_pre, termp_quote_post }, /* Qo */
        { termp_quote_pre, termp_quote_post }, /* Qq */
        { NULL, NULL }, /* Re */
        { termp_rs_pre, NULL }, /* Rs */
        { NULL, NULL }, /* Sc */
        { termp_quote_pre, termp_quote_post }, /* So */
        { termp_quote_pre, termp_quote_post }, /* Sq */
        { termp_sm_pre, NULL }, /* Sm */
        { termp_under_pre, NULL }, /* Sx */
        { termp_bold_pre, NULL }, /* Sy */
        { NULL, NULL }, /* Tn */
        { termp_xx_pre, termp_xx_post }, /* Ux */
        { NULL, NULL }, /* Xc */
        { NULL, NULL }, /* Xo */
        { termp_fo_pre, termp_fo_post }, /* Fo */
        { NULL, NULL }, /* Fc */
        { termp_quote_pre, termp_quote_post }, /* Oo */
        { NULL, NULL }, /* Oc */
        { termp_bk_pre, termp_bk_post }, /* Bk */
        { NULL, NULL }, /* Ek */
        { NULL, NULL }, /* Bt */
        { NULL, NULL }, /* Hf */
        { termp_under_pre, NULL }, /* Fr */
        { NULL, NULL }, /* Ud */
        { NULL, termp_lb_post }, /* Lb */
        { termp_abort_pre, NULL }, /* Lp */
        { termp_lk_pre, NULL }, /* Lk */
        { termp_under_pre, NULL }, /* Mt */
        { termp_quote_pre, termp_quote_post }, /* Brq */
        { termp_quote_pre, termp_quote_post }, /* Bro */
        { NULL, NULL }, /* Brc */
        { NULL, termp____post }, /* %C */
        { termp_skip_pre, NULL }, /* Es */
        { termp_quote_pre, termp_quote_post }, /* En */
        { termp_xx_pre, termp_xx_post }, /* Dx */
        { NULL, termp____post }, /* %Q */
        { NULL, termp____post }, /* %U */
        { NULL, NULL }, /* Ta */
        { termp_skip_pre, NULL }, /* Tg */
};


void
terminal_mdoc(void *arg, const struct roff_meta *mdoc)
{
        struct roff_node        *n, *nn;
        struct termp            *p;
        size_t                   save_defindent;

        p = (struct termp *)arg;
        p->tcol->rmargin = p->maxrmargin = p->defrmargin;
        term_tab_set(p, NULL);
        term_tab_set(p, "T");
        term_tab_set(p, ".5i");

        n = mdoc->first->child;
        if (p->synopsisonly) {
                for (nn = NULL; n != NULL; n = n->next) {
                        if (n->tok != MDOC_Sh)
                                continue;
                        if (n->sec == SEC_SYNOPSIS)
                                break;
                        if (nn == NULL && n->sec == SEC_NAME)
                                nn = n;
                }
                if (n == NULL)
                        n = nn;
                p->flags |= TERMP_NOSPACE;
                if (n != NULL && (n = n->child->next->child) != NULL)
                        print_mdoc_nodelist(p, NULL, mdoc, n);
                term_newln(p);
        } else {
                save_defindent = p->defindent;
                if (p->defindent == 0)
                        p->defindent = 5;
                term_begin(p, print_mdoc_head, print_mdoc_foot, mdoc);
                while (n != NULL &&
                    (n->type == ROFFT_COMMENT ||
                     n->flags & NODE_NOPRT))
                        n = n->next;
                if (n != NULL) {
                        if (n->tok != MDOC_Sh)
                                term_vspace(p);
                        print_mdoc_nodelist(p, NULL, mdoc, n);
                }
                term_end(p);
                p->defindent = save_defindent;
        }
}

static void
print_mdoc_nodelist(DECL_ARGS)
{
        while (n != NULL) {
                print_mdoc_node(p, pair, meta, n);
                n = n->next;
        }
}

static void
print_mdoc_node(DECL_ARGS)
{
        const struct mdoc_term_act *act;
        struct termpair  npair;
        size_t           offset, rmargin;
        int              chld;

        /*
         * In no-fill mode, break the output line at the beginning
         * of new input lines except after \c, and nowhere else.
         */

        if (n->flags & NODE_NOFILL) {
                if (n->flags & NODE_LINE &&
                    (p->flags & TERMP_NONEWLINE) == 0)
                        term_newln(p);
                p->flags |= TERMP_BRNEVER;
        } else
                p->flags &= ~TERMP_BRNEVER;

        if (n->type == ROFFT_COMMENT || n->flags & NODE_NOPRT)
                return;

        chld = 1;
        offset = p->tcol->offset;
        rmargin = p->tcol->rmargin;
        n->flags &= ~NODE_ENDED;
        n->prev_font = p->fonti;

        memset(&npair, 0, sizeof(struct termpair));
        npair.ppair = pair;

        if (n->flags & NODE_ID && n->tok != MDOC_Pp &&
            (n->tok != MDOC_It || n->type != ROFFT_BLOCK))
                term_tag_write(n, p->line);

        /*
         * Keeps only work until the end of a line.  If a keep was
         * invoked in a prior line, revert it to PREKEEP.
         */

        if (p->flags & TERMP_KEEP && n->flags & NODE_LINE) {
                p->flags &= ~TERMP_KEEP;
                p->flags |= TERMP_PREKEEP;
        }

        /*
         * After the keep flags have been set up, we may now
         * produce output.  Note that some pre-handlers do so.
         */

        act = NULL;
        switch (n->type) {
        case ROFFT_TEXT:
                if (n->flags & NODE_LINE) {
                        switch (*n->string) {
                        case '\0':
                                if (p->flags & TERMP_NONEWLINE)
                                        term_newln(p);
                                else
                                        term_vspace(p);
                                return;
                        case ' ':
                                if ((p->flags & TERMP_NONEWLINE) == 0)
                                        term_newln(p);
                                break;
                        default:
                                break;
                        }
                }
                if (NODE_DELIMC & n->flags)
                        p->flags |= TERMP_NOSPACE;
                term_word(p, n->string);
                if (NODE_DELIMO & n->flags)
                        p->flags |= TERMP_NOSPACE;
                break;
        case ROFFT_EQN:
                if ( ! (n->flags & NODE_LINE))
                        p->flags |= TERMP_NOSPACE;
                term_eqn(p, n->eqn);
                if (n->next != NULL && ! (n->next->flags & NODE_LINE))
                        p->flags |= TERMP_NOSPACE;
                break;
        case ROFFT_TBL:
                if (p->tbl.cols == NULL)
                        term_newln(p);
                term_tbl(p, n->span);
                break;
        default:
                if (n->tok < ROFF_MAX) {
                        roff_term_pre(p, n);
                        return;
                }
                assert(n->tok >= MDOC_Dd && n->tok < MDOC_MAX);
                act = mdoc_term_acts + (n->tok - MDOC_Dd);
                if (act->pre != NULL &&
                    (n->end == ENDBODY_NOT || n->child != NULL))
                        chld = (*act->pre)(p, &npair, meta, n);
                break;
        }

        if (chld && n->child)
                print_mdoc_nodelist(p, &npair, meta, n->child);

        term_fontpopq(p,
            (ENDBODY_NOT == n->end ? n : n->body)->prev_font);

        switch (n->type) {
        case ROFFT_TEXT:
                break;
        case ROFFT_TBL:
                break;
        case ROFFT_EQN:
                break;
        default:
                if (act->post == NULL || n->flags & NODE_ENDED)
                        break;
                (void)(*act->post)(p, &npair, meta, n);

                /*
                 * Explicit end tokens not only call the post
                 * handler, but also tell the respective block
                 * that it must not call the post handler again.
                 */
                if (ENDBODY_NOT != n->end)
                        n->body->flags |= NODE_ENDED;
                break;
        }

        if (NODE_EOS & n->flags)
                p->flags |= TERMP_SENTENCE;

        if (n->type != ROFFT_TEXT)
                p->tcol->offset = offset;
        p->tcol->rmargin = rmargin;
}

static void
print_mdoc_foot(struct termp *p, const struct roff_meta *meta)
{
        size_t sz;

        term_fontrepl(p, TERMFONT_NONE);

        /*
         * Output the footer in new-groff style, that is, three columns
         * with the middle being the manual date and flanking columns
         * being the operating system:
         *
         * SYSTEM                  DATE                    SYSTEM
         */

        term_vspace(p);

        p->tcol->offset = 0;
        sz = term_strlen(p, meta->date);
        p->tcol->rmargin = p->maxrmargin > sz ?
            (p->maxrmargin + term_len(p, 1) - sz) / 2 : 0;
        p->trailspace = 1;
        p->flags |= TERMP_NOSPACE | TERMP_NOBREAK;

        term_word(p, meta->os);
        term_flushln(p);

        p->tcol->offset = p->tcol->rmargin;
        sz = term_strlen(p, meta->os);
        p->tcol->rmargin = p->maxrmargin > sz ? p->maxrmargin - sz : 0;
        p->flags |= TERMP_NOSPACE;

        term_word(p, meta->date);
        term_flushln(p);

        p->tcol->offset = p->tcol->rmargin;
        p->tcol->rmargin = p->maxrmargin;
        p->trailspace = 0;
        p->flags &= ~TERMP_NOBREAK;
        p->flags |= TERMP_NOSPACE;

        term_word(p, meta->os);
        term_flushln(p);

        p->tcol->offset = 0;
        p->tcol->rmargin = p->maxrmargin;
        p->flags = 0;
}

static void
print_mdoc_head(struct termp *p, const struct roff_meta *meta)
{
        char                    *volume, *title;
        size_t                   vollen, titlen;

        /*
         * The header is strange.  It has three components, which are
         * really two with the first duplicated.  It goes like this:
         *
         * IDENTIFIER              TITLE                   IDENTIFIER
         *
         * The IDENTIFIER is NAME(SECTION), which is the command-name
         * (if given, or "unknown" if not) followed by the manual page
         * section.  These are given in `Dt'.  The TITLE is a free-form
         * string depending on the manual volume.  If not specified, it
         * switches on the manual section.
         */

        assert(meta->vol);
        if (NULL == meta->arch)
                volume = mandoc_strdup(meta->vol);
        else
                mandoc_asprintf(&volume, "%s (%s)",
                    meta->vol, meta->arch);
        vollen = term_strlen(p, volume);

        if (NULL == meta->msec)
                title = mandoc_strdup(meta->title);
        else
                mandoc_asprintf(&title, "%s(%s)",
                    meta->title, meta->msec);
        titlen = term_strlen(p, title);

        p->flags |= TERMP_NOBREAK | TERMP_NOSPACE;
        p->trailspace = 1;
        p->tcol->offset = 0;
        p->tcol->rmargin = 2 * (titlen+1) + vollen < p->maxrmargin ?
            (p->maxrmargin - vollen + term_len(p, 1)) / 2 :
            vollen < p->maxrmargin ?  p->maxrmargin - vollen : 0;

        term_word(p, title);
        term_flushln(p);

        p->flags |= TERMP_NOSPACE;
        p->tcol->offset = p->tcol->rmargin;
        p->tcol->rmargin = p->tcol->offset + vollen + titlen <
            p->maxrmargin ? p->maxrmargin - titlen : p->maxrmargin;

        term_word(p, volume);
        term_flushln(p);

        p->flags &= ~TERMP_NOBREAK;
        p->trailspace = 0;
        if (p->tcol->rmargin + titlen <= p->maxrmargin) {
                p->flags |= TERMP_NOSPACE;
                p->tcol->offset = p->tcol->rmargin;
                p->tcol->rmargin = p->maxrmargin;
                term_word(p, title);
                term_flushln(p);
        }

        p->flags &= ~TERMP_NOSPACE;
        p->tcol->offset = 0;
        p->tcol->rmargin = p->maxrmargin;
        free(title);
        free(volume);
}

static int
a2width(const struct termp *p, const char *v)
{
        struct roffsu    su;
        const char      *end;

        end = a2roffsu(v, &su, SCALE_MAX);
        if (end == NULL || *end != '\0') {
                SCALE_HS_INIT(&su, term_strlen(p, v));
                su.scale /= term_strlen(p, "0");
        }
        return term_hen(p, &su);
}

/*
 * Determine how much space to print out before block elements of `It'
 * (and thus `Bl') and `Bd'.  And then go ahead and print that space,
 * too.
 */
static void
print_bvspace(struct termp *p, struct roff_node *bl, struct roff_node *n)
{
        struct roff_node *nn;

        term_newln(p);

        if ((bl->tok == MDOC_Bd && bl->norm->Bd.comp) ||
            (bl->tok == MDOC_Bl && bl->norm->Bl.comp))
                return;

        /* Do not vspace directly after Ss/Sh. */

        nn = n;
        while (roff_node_prev(nn) == NULL) {
                do {
                        nn = nn->parent;
                        if (nn->type == ROFFT_ROOT)
                                return;
                } while (nn->type != ROFFT_BLOCK);
                if (nn->tok == MDOC_Sh || nn->tok == MDOC_Ss)
                        return;
                if (nn->tok == MDOC_It &&
                    nn->parent->parent->norm->Bl.type != LIST_item)
                        break;
        }

        /*
         * No vertical space after:
         * items in .Bl -column
         * items without a body in .Bl -diag
         */

        if (bl->tok != MDOC_Bl ||
            n->prev == NULL || n->prev->tok != MDOC_It ||
            (bl->norm->Bl.type != LIST_column &&
             (bl->norm->Bl.type != LIST_diag ||
              n->prev->body->child != NULL)))
                term_vspace(p);
}


static int
termp_it_pre(DECL_ARGS)
{
        struct roffsu           su;
        char                    buf[24];
        const struct roff_node *bl, *nn;
        size_t                  ncols, dcol;
        int                     i, offset, width;
        enum mdoc_list          type;

        if (n->type == ROFFT_BLOCK) {
                print_bvspace(p, n->parent->parent, n);
                if (n->flags & NODE_ID)
                        term_tag_write(n, p->line);
                return 1;
        }

        bl = n->parent->parent->parent;
        type = bl->norm->Bl.type;

        /*
         * Defaults for specific list types.
         */

        switch (type) {
        case LIST_bullet:
        case LIST_dash:
        case LIST_hyphen:
        case LIST_enum:
                width = term_len(p, 2);
                break;
        case LIST_hang:
        case LIST_tag:
                width = term_len(p, 8);
                break;
        case LIST_column:
                width = term_len(p, 10);
                break;
        default:
                width = 0;
                break;
        }
        offset = 0;

        /*
         * First calculate width and offset.  This is pretty easy unless
         * we're a -column list, in which case all prior columns must
         * be accounted for.
         */

        if (bl->norm->Bl.offs != NULL) {
                offset = a2width(p, bl->norm->Bl.offs);
                if (offset < 0 && (size_t)(-offset) > p->tcol->offset)
                        offset = -p->tcol->offset;
                else if (offset > SHRT_MAX)
                        offset = 0;
        }

        switch (type) {
        case LIST_column:
                if (n->type == ROFFT_HEAD)
                        break;

                /*
                 * Imitate groff's column handling:
                 * - For each earlier column, add its width.
                 * - For less than 5 columns, add four more blanks per
                 *   column.
                 * - For exactly 5 columns, add three more blank per
                 *   column.
                 * - For more than 5 columns, add only one column.
                 */
                ncols = bl->norm->Bl.ncols;
                dcol = ncols < 5 ? term_len(p, 4) :
                    ncols == 5 ? term_len(p, 3) : term_len(p, 1);

                /*
                 * Calculate the offset by applying all prior ROFFT_BODY,
                 * so we stop at the ROFFT_HEAD (nn->prev == NULL).
                 */

                for (i = 0, nn = n->prev;
                    nn->prev && i < (int)ncols;
                    nn = nn->prev, i++) {
                        SCALE_HS_INIT(&su,
                            term_strlen(p, bl->norm->Bl.cols[i]));
                        su.scale /= term_strlen(p, "0");
                        offset += term_hen(p, &su) + dcol;
                }

                /*
                 * When exceeding the declared number of columns, leave
                 * the remaining widths at 0.  This will later be
                 * adjusted to the default width of 10, or, for the last
                 * column, stretched to the right margin.
                 */
                if (i >= (int)ncols)
                        break;

                /*
                 * Use the declared column widths, extended as explained
                 * in the preceding paragraph.
                 */
                SCALE_HS_INIT(&su, term_strlen(p, bl->norm->Bl.cols[i]));
                su.scale /= term_strlen(p, "0");
                width = term_hen(p, &su) + dcol;
                break;
        default:
                if (NULL == bl->norm->Bl.width)
                        break;

                /*
                 * Note: buffer the width by 2, which is groff's magic
                 * number for buffering single arguments.  See the above
                 * handling for column for how this changes.
                 */
                width = a2width(p, bl->norm->Bl.width) + term_len(p, 2);
                if (width < 0 && (size_t)(-width) > p->tcol->offset)
                        width = -p->tcol->offset;
                else if (width > SHRT_MAX)
                        width = 0;
                break;
        }

        /*
         * Whitespace control.  Inset bodies need an initial space,
         * while diagonal bodies need two.
         */

        p->flags |= TERMP_NOSPACE;

        switch (type) {
        case LIST_diag:
                if (n->type == ROFFT_BODY)
                        term_word(p, "\\ \\ ");
                break;
        case LIST_inset:
                if (n->type == ROFFT_BODY && n->parent->head->child != NULL)
                        term_word(p, "\\ ");
                break;
        default:
                break;
        }

        p->flags |= TERMP_NOSPACE;

        switch (type) {
        case LIST_diag:
                if (n->type == ROFFT_HEAD)
                        term_fontpush(p, TERMFONT_BOLD);
                break;
        default:
                break;
        }

        /*
         * Pad and break control.  This is the tricky part.  These flags
         * are documented in term_flushln() in term.c.  Note that we're
         * going to unset all of these flags in termp_it_post() when we
         * exit.
         */

        switch (type) {
        case LIST_enum:
        case LIST_bullet:
        case LIST_dash:
        case LIST_hyphen:
                if (n->type == ROFFT_HEAD) {
                        p->flags |= TERMP_NOBREAK | TERMP_HANG;
                        p->trailspace = 1;
                } else if (width <= (int)term_len(p, 2))
                        p->flags |= TERMP_NOPAD;
                break;
        case LIST_hang:
                if (n->type != ROFFT_HEAD)
                        break;
                p->flags |= TERMP_NOBREAK | TERMP_BRIND | TERMP_HANG;
                p->trailspace = 1;
                break;
        case LIST_tag:
                if (n->type != ROFFT_HEAD)
                        break;

                p->flags |= TERMP_NOBREAK | TERMP_BRTRSP | TERMP_BRIND;
                p->trailspace = 2;

                if (NULL == n->next || NULL == n->next->child)
                        p->flags |= TERMP_HANG;
                break;
        case LIST_column:
                if (n->type == ROFFT_HEAD)
                        break;

                if (NULL == n->next) {
                        p->flags &= ~TERMP_NOBREAK;
                        p->trailspace = 0;
                } else {
                        p->flags |= TERMP_NOBREAK;
                        p->trailspace = 1;
                }

                break;
        case LIST_diag:
                if (n->type != ROFFT_HEAD)
                        break;
                p->flags |= TERMP_NOBREAK | TERMP_BRIND;
                p->trailspace = 1;
                break;
        default:
                break;
        }

        /*
         * Margin control.  Set-head-width lists have their right
         * margins shortened.  The body for these lists has the offset
         * necessarily lengthened.  Everybody gets the offset.
         */

        p->tcol->offset += offset;

        switch (type) {
        case LIST_bullet:
        case LIST_dash:
        case LIST_enum:
        case LIST_hyphen:
        case LIST_hang:
        case LIST_tag:
                if (n->type == ROFFT_HEAD)
                        p->tcol->rmargin = p->tcol->offset + width;
                else
                        p->tcol->offset += width;
                break;
        case LIST_column:
                assert(width);
                p->tcol->rmargin = p->tcol->offset + width;
                /*
                 * XXX - this behaviour is not documented: the
                 * right-most column is filled to the right margin.
                 */
                if (n->type == ROFFT_HEAD)
                        break;
                if (n->next == NULL && p->tcol->rmargin < p->maxrmargin)
                        p->tcol->rmargin = p->maxrmargin;
                break;
        default:
                break;
        }

        /*
         * The dash, hyphen, bullet and enum lists all have a special
         * HEAD character (temporarily bold, in some cases).
         */

        if (n->type == ROFFT_HEAD)
                switch (type) {
                case LIST_bullet:
                        term_fontpush(p, TERMFONT_BOLD);
                        term_word(p, "\\[bu]");
                        term_fontpop(p);
                        break;
                case LIST_dash:
                case LIST_hyphen:
                        term_fontpush(p, TERMFONT_BOLD);
                        term_word(p, "-");
                        term_fontpop(p);
                        break;
                case LIST_enum:
                        (pair->ppair->ppair->count)++;
                        (void)snprintf(buf, sizeof(buf), "%d.",
                            pair->ppair->ppair->count);
                        term_word(p, buf);
                        break;
                default:
                        break;
                }

        /*
         * If we're not going to process our children, indicate so here.
         */

        switch (type) {
        case LIST_bullet:
        case LIST_item:
        case LIST_dash:
        case LIST_hyphen:
        case LIST_enum:
                if (n->type == ROFFT_HEAD)
                        return 0;
                break;
        case LIST_column:
                if (n->type == ROFFT_HEAD)
                        return 0;
                p->minbl = 0;
                break;
        default:
                break;
        }

        return 1;
}

static void
termp_it_post(DECL_ARGS)
{
        enum mdoc_list     type;

        if (n->type == ROFFT_BLOCK)
                return;

        type = n->parent->parent->parent->norm->Bl.type;

        switch (type) {
        case LIST_item:
        case LIST_diag:
        case LIST_inset:
                if (n->type == ROFFT_BODY)
                        term_newln(p);
                break;
        case LIST_column:
                if (n->type == ROFFT_BODY)
                        term_flushln(p);
                break;
        default:
                term_newln(p);
                break;
        }

        /*
         * Now that our output is flushed, we can reset our tags.  Since
         * only `It' sets these flags, we're free to assume that nobody
         * has munged them in the meanwhile.
         */

        p->flags &= ~(TERMP_NOBREAK | TERMP_BRTRSP | TERMP_BRIND | TERMP_HANG);
        p->trailspace = 0;
}

static int
termp_nm_pre(DECL_ARGS)
{
        const char      *cp;

        if (n->type == ROFFT_BLOCK) {
                p->flags |= TERMP_PREKEEP;
                return 1;
        }

        if (n->type == ROFFT_BODY) {
                if (n->child == NULL)
                        return 0;
                p->flags |= TERMP_NOSPACE;
                cp = NULL;
                if (n->prev->child != NULL)
                    cp = n->prev->child->string;
                if (cp == NULL)
                        cp = meta->name;
                if (cp == NULL)
                        p->tcol->offset += term_len(p, 6);
                else
                        p->tcol->offset += term_len(p, 1) +
                            term_strlen(p, cp);
                return 1;
        }

        if (n->child == NULL)
                return 0;

        if (n->type == ROFFT_HEAD)
                synopsis_pre(p, n->parent);

        if (n->type == ROFFT_HEAD &&
            n->next != NULL && n->next->child != NULL) {
                p->flags |= TERMP_NOSPACE | TERMP_NOBREAK | TERMP_BRIND;
                p->trailspace = 1;
                p->tcol->rmargin = p->tcol->offset + term_len(p, 1);
                if (n->child == NULL)
                        p->tcol->rmargin += term_strlen(p, meta->name);
                else if (n->child->type == ROFFT_TEXT) {
                        p->tcol->rmargin += term_strlen(p, n->child->string);
                        if (n->child->next != NULL)
                                p->flags |= TERMP_HANG;
                } else {
                        p->tcol->rmargin += term_len(p, 5);
                        p->flags |= TERMP_HANG;
                }
        }
        return termp_bold_pre(p, pair, meta, n);
}

static void
termp_nm_post(DECL_ARGS)
{
        switch (n->type) {
        case ROFFT_BLOCK:
                p->flags &= ~(TERMP_KEEP | TERMP_PREKEEP);
                break;
        case ROFFT_HEAD:
                if (n->next == NULL || n->next->child == NULL)
                        break;
                term_flushln(p);
                p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND | TERMP_HANG);
                p->trailspace = 0;
                break;
        case ROFFT_BODY:
                if (n->child != NULL)
                        term_flushln(p);
                break;
        default:
                break;
        }
}

static int
termp_fl_pre(DECL_ARGS)
{
        struct roff_node *nn;

        term_fontpush(p, TERMFONT_BOLD);
        term_word(p, "\\-");

        if (n->child != NULL ||
            ((nn = roff_node_next(n)) != NULL &&
             nn->type != ROFFT_TEXT &&
             (nn->flags & NODE_LINE) == 0))
                p->flags |= TERMP_NOSPACE;

        return 1;
}

static int
termp__a_pre(DECL_ARGS)
{
        struct roff_node *nn;

        if ((nn = roff_node_prev(n)) != NULL && nn->tok == MDOC__A &&
            ((nn = roff_node_next(n)) == NULL || nn->tok != MDOC__A))
                term_word(p, "and");

        return 1;
}

static int
termp_an_pre(DECL_ARGS)
{

        if (n->norm->An.auth == AUTH_split) {
                p->flags &= ~TERMP_NOSPLIT;
                p->flags |= TERMP_SPLIT;
                return 0;
        }
        if (n->norm->An.auth == AUTH_nosplit) {
                p->flags &= ~TERMP_SPLIT;
                p->flags |= TERMP_NOSPLIT;
                return 0;
        }

        if (p->flags & TERMP_SPLIT)
                term_newln(p);

        if (n->sec == SEC_AUTHORS && ! (p->flags & TERMP_NOSPLIT))
                p->flags |= TERMP_SPLIT;

        return 1;
}

static int
termp_ns_pre(DECL_ARGS)
{

        if ( ! (NODE_LINE & n->flags))
                p->flags |= TERMP_NOSPACE;
        return 1;
}

static int
termp_rs_pre(DECL_ARGS)
{
        if (SEC_SEE_ALSO != n->sec)
                return 1;
        if (n->type == ROFFT_BLOCK && roff_node_prev(n) != NULL)
                term_vspace(p);
        return 1;
}

static int
termp_ex_pre(DECL_ARGS)
{
        term_newln(p);
        return 1;
}

static int
termp_nd_pre(DECL_ARGS)
{
        if (n->type == ROFFT_BODY)
                term_word(p, "\\(en");
        return 1;
}

static int
termp_bl_pre(DECL_ARGS)
{
        switch (n->type) {
        case ROFFT_BLOCK:
                term_newln(p);
                return 1;
        case ROFFT_HEAD:
                return 0;
        default:
                return 1;
        }
}

static void
termp_bl_post(DECL_ARGS)
{
        if (n->type != ROFFT_BLOCK)
                return;
        term_newln(p);
        if (n->tok != MDOC_Bl || n->norm->Bl.type != LIST_column)
                return;
        term_tab_set(p, NULL);
        term_tab_set(p, "T");
        term_tab_set(p, ".5i");
}

static int
termp_xr_pre(DECL_ARGS)
{
        if (NULL == (n = n->child))
                return 0;

        assert(n->type == ROFFT_TEXT);
        term_word(p, n->string);

        if (NULL == (n = n->next))
                return 0;

        p->flags |= TERMP_NOSPACE;
        term_word(p, "(");
        p->flags |= TERMP_NOSPACE;

        assert(n->type == ROFFT_TEXT);
        term_word(p, n->string);

        p->flags |= TERMP_NOSPACE;
        term_word(p, ")");

        return 0;
}

/*
 * This decides how to assert whitespace before any of the SYNOPSIS set
 * of macros (which, as in the case of Ft/Fo and Ft/Fn, may contain
 * macro combos).
 */
static void
synopsis_pre(struct termp *p, struct roff_node *n)
{
        struct roff_node        *np;

        if ((n->flags & NODE_SYNPRETTY) == 0 ||
            (np = roff_node_prev(n)) == NULL)
                return;

        /*
         * If we're the second in a pair of like elements, emit our
         * newline and return.  UNLESS we're `Fo', `Fn', `Fn', in which
         * case we soldier on.
         */
        if (np->tok == n->tok &&
            MDOC_Ft != n->tok &&
            MDOC_Fo != n->tok &&
            MDOC_Fn != n->tok) {
                term_newln(p);
                return;
        }

        /*
         * If we're one of the SYNOPSIS set and non-like pair-wise after
         * another (or Fn/Fo, which we've let slip through) then assert
         * vertical space, else only newline and move on.
         */
        switch (np->tok) {
        case MDOC_Fd:
        case MDOC_Fn:
        case MDOC_Fo:
        case MDOC_In:
        case MDOC_Vt:
                term_vspace(p);
                break;
        case MDOC_Ft:
                if (n->tok != MDOC_Fn && n->tok != MDOC_Fo) {
                        term_vspace(p);
                        break;
                }
                /* FALLTHROUGH */
        default:
                term_newln(p);
                break;
        }
}

static int
termp_vt_pre(DECL_ARGS)
{
        switch (n->type) {
        case ROFFT_ELEM:
                return termp_ft_pre(p, pair, meta, n);
        case ROFFT_BLOCK:
                synopsis_pre(p, n);
                return 1;
        case ROFFT_HEAD:
                return 0;
        default:
                return termp_under_pre(p, pair, meta, n);
        }
}

static int
termp_bold_pre(DECL_ARGS)
{
        term_fontpush(p, TERMFONT_BOLD);
        return 1;
}

static int
termp_fd_pre(DECL_ARGS)
{
        synopsis_pre(p, n);
        return termp_bold_pre(p, pair, meta, n);
}

static void
termp_fd_post(DECL_ARGS)
{
        term_newln(p);
}

static int
termp_sh_pre(DECL_ARGS)
{
        struct roff_node        *np;

        switch (n->type) {
        case ROFFT_BLOCK:
                /*
                 * Vertical space before sections, except
                 * when the previous section was empty.
                 */
                if ((np = roff_node_prev(n)) == NULL ||
                    np->tok != MDOC_Sh ||
                    (np->body != NULL && np->body->child != NULL))
                        term_vspace(p);
                break;
        case ROFFT_HEAD:
                return termp_bold_pre(p, pair, meta, n);
        case ROFFT_BODY:
                p->tcol->offset = term_len(p, p->defindent);
                term_tab_set(p, NULL);
                term_tab_set(p, "T");
                term_tab_set(p, ".5i");
                if (n->sec == SEC_AUTHORS)
                        p->flags &= ~(TERMP_SPLIT|TERMP_NOSPLIT);
                break;
        default:
                break;
        }
        return 1;
}

static void
termp_sh_post(DECL_ARGS)
{
        switch (n->type) {
        case ROFFT_HEAD:
                term_newln(p);
                break;
        case ROFFT_BODY:
                term_newln(p);
                p->tcol->offset = 0;
                break;
        default:
                break;
        }
}

static void
termp_lb_post(DECL_ARGS)
{
        if (n->sec == SEC_LIBRARY && n->flags & NODE_LINE)
                term_newln(p);
}

static int
termp_d1_pre(DECL_ARGS)
{
        if (n->type != ROFFT_BLOCK)
                return 1;
        term_newln(p);
        p->tcol->offset += term_len(p, p->defindent + 1);
        term_tab_set(p, NULL);
        term_tab_set(p, "T");
        term_tab_set(p, ".5i");
        return 1;
}

static int
termp_ft_pre(DECL_ARGS)
{
        synopsis_pre(p, n);
        return termp_under_pre(p, pair, meta, n);
}

static int
termp_fn_pre(DECL_ARGS)
{
        size_t           rmargin = 0;
        int              pretty;

        synopsis_pre(p, n);
        pretty = n->flags & NODE_SYNPRETTY;
        if ((n = n->child) == NULL)
                return 0;

        if (pretty) {
                rmargin = p->tcol->rmargin;
                p->tcol->rmargin = p->tcol->offset + term_len(p, 4);
                p->flags |= TERMP_NOBREAK | TERMP_BRIND | TERMP_HANG;
        }

        assert(n->type == ROFFT_TEXT);
        term_fontpush(p, TERMFONT_BOLD);
        term_word(p, n->string);
        term_fontpop(p);

        if (pretty) {
                term_flushln(p);
                p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND | TERMP_HANG);
                p->flags |= TERMP_NOPAD;
                p->tcol->offset = p->tcol->rmargin;
                p->tcol->rmargin = rmargin;
        }

        p->flags |= TERMP_NOSPACE;
        term_word(p, "(");
        p->flags |= TERMP_NOSPACE;

        for (n = n->next; n; n = n->next) {
                assert(n->type == ROFFT_TEXT);
                term_fontpush(p, TERMFONT_UNDER);
                if (pretty)
                        p->flags |= TERMP_NBRWORD;
                term_word(p, n->string);
                term_fontpop(p);

                if (n->next) {
                        p->flags |= TERMP_NOSPACE;
                        term_word(p, ",");
                }
        }

        p->flags |= TERMP_NOSPACE;
        term_word(p, ")");

        if (pretty) {
                p->flags |= TERMP_NOSPACE;
                term_word(p, ";");
                term_flushln(p);
        }
        return 0;
}

static int
termp_fa_pre(DECL_ARGS)
{
        const struct roff_node  *nn;

        if (n->parent->tok != MDOC_Fo)
                return termp_under_pre(p, pair, meta, n);

        for (nn = n->child; nn != NULL; nn = nn->next) {
                term_fontpush(p, TERMFONT_UNDER);
                p->flags |= TERMP_NBRWORD;
                term_word(p, nn->string);
                term_fontpop(p);
                if (nn->next != NULL) {
                        p->flags |= TERMP_NOSPACE;
                        term_word(p, ",");
                }
        }
        if (n->child != NULL &&
            (nn = roff_node_next(n)) != NULL &&
            nn->tok == MDOC_Fa) {
                p->flags |= TERMP_NOSPACE;
                term_word(p, ",");
        }
        return 0;
}

static int
termp_bd_pre(DECL_ARGS)
{
        int                      offset;

        if (n->type == ROFFT_BLOCK) {
                print_bvspace(p, n, n);
                return 1;
        } else if (n->type == ROFFT_HEAD)
                return 0;

        /* Handle the -offset argument. */

        if (n->norm->Bd.offs == NULL ||
            ! strcmp(n->norm->Bd.offs, "left"))
                /* nothing */;
        else if ( ! strcmp(n->norm->Bd.offs, "indent"))
                p->tcol->offset += term_len(p, p->defindent + 1);
        else if ( ! strcmp(n->norm->Bd.offs, "indent-two"))
                p->tcol->offset += term_len(p, (p->defindent + 1) * 2);
        else {
                offset = a2width(p, n->norm->Bd.offs);
                if (offset < 0 && (size_t)(-offset) > p->tcol->offset)
                        p->tcol->offset = 0;
                else if (offset < SHRT_MAX)
                        p->tcol->offset += offset;
        }

        switch (n->norm->Bd.type) {
        case DISP_literal:
                term_tab_set(p, NULL);
                term_tab_set(p, "T");
                term_tab_set(p, "8n");
                break;
        case DISP_centered:
                p->flags |= TERMP_CENTER;
                break;
        default:
                break;
        }
        return 1;
}

static void
termp_bd_post(DECL_ARGS)
{
        if (n->type != ROFFT_BODY)
                return;
        if (n->norm->Bd.type == DISP_unfilled ||
            n->norm->Bd.type == DISP_literal)
                p->flags |= TERMP_BRNEVER;
        p->flags |= TERMP_NOSPACE;
        term_newln(p);
        p->flags &= ~TERMP_BRNEVER;
        if (n->norm->Bd.type == DISP_centered)
                p->flags &= ~TERMP_CENTER;
}

static int
termp_xx_pre(DECL_ARGS)
{
        if ((n->aux = p->flags & TERMP_PREKEEP) == 0)
                p->flags |= TERMP_PREKEEP;
        return 1;
}

static void
termp_xx_post(DECL_ARGS)
{
        if (n->aux == 0)
                p->flags &= ~(TERMP_KEEP | TERMP_PREKEEP);
}

static void
termp_pf_post(DECL_ARGS)
{
        if (n->next != NULL && (n->next->flags & NODE_LINE) == 0)
                p->flags |= TERMP_NOSPACE;
}

static int
termp_ss_pre(DECL_ARGS)
{
        switch (n->type) {
        case ROFFT_BLOCK:
                if (roff_node_prev(n) == NULL)
                        term_newln(p);
                else
                        term_vspace(p);
                break;
        case ROFFT_HEAD:
                p->tcol->offset = term_len(p, (p->defindent+1)/2);
                return termp_bold_pre(p, pair, meta, n);
        case ROFFT_BODY:
                p->tcol->offset = term_len(p, p->defindent);
                term_tab_set(p, NULL);
                term_tab_set(p, "T");
                term_tab_set(p, ".5i");
                break;
        default:
                break;
        }
        return 1;
}

static void
termp_ss_post(DECL_ARGS)
{
        if (n->type == ROFFT_HEAD || n->type == ROFFT_BODY)
                term_newln(p);
}

static int
termp_in_pre(DECL_ARGS)
{
        synopsis_pre(p, n);
        if (n->flags & NODE_SYNPRETTY && n->flags & NODE_LINE) {
                term_fontpush(p, TERMFONT_BOLD);
                term_word(p, "#include");
                term_word(p, "<");
        } else {
                term_word(p, "<");
                term_fontpush(p, TERMFONT_UNDER);
        }
        p->flags |= TERMP_NOSPACE;
        return 1;
}

static void
termp_in_post(DECL_ARGS)
{
        if (n->flags & NODE_SYNPRETTY)
                term_fontpush(p, TERMFONT_BOLD);
        p->flags |= TERMP_NOSPACE;
        term_word(p, ">");
        if (n->flags & NODE_SYNPRETTY)
                term_fontpop(p);
}

static int
termp_pp_pre(DECL_ARGS)
{
        term_vspace(p);
        if (n->flags & NODE_ID)
                term_tag_write(n, p->line);
        return 0;
}

static int
termp_skip_pre(DECL_ARGS)
{
        return 0;
}

static int
termp_quote_pre(DECL_ARGS)
{
        if (n->type != ROFFT_BODY && n->type != ROFFT_ELEM)
                return 1;

        switch (n->tok) {
        case MDOC_Ao:
        case MDOC_Aq:
                term_word(p, n->child != NULL && n->child->next == NULL &&
                    n->child->tok == MDOC_Mt ? "<" : "\\(la");
                break;
        case MDOC_Bro:
        case MDOC_Brq:
                term_word(p, "{");
                break;
        case MDOC_Oo:
        case MDOC_Op:
        case MDOC_Bo:
        case MDOC_Bq:
                term_word(p, "[");
                break;
        case MDOC__T:
                /* FALLTHROUGH */
        case MDOC_Do:
        case MDOC_Dq:
                term_word(p, "\\(lq");
                break;
        case MDOC_En:
                if (NULL == n->norm->Es ||
                    NULL == n->norm->Es->child)
                        return 1;
                term_word(p, n->norm->Es->child->string);
                break;
        case MDOC_Po:
        case MDOC_Pq:
                term_word(p, "(");
                break;
        case MDOC_Qo:
        case MDOC_Qq:
                term_word(p, "\"");
                break;
        case MDOC_Ql:
        case MDOC_So:
        case MDOC_Sq:
                term_word(p, "\\(oq");
                break;
        default:
                abort();
        }

        p->flags |= TERMP_NOSPACE;
        return 1;
}

static void
termp_quote_post(DECL_ARGS)
{

        if (n->type != ROFFT_BODY && n->type != ROFFT_ELEM)
                return;

        p->flags |= TERMP_NOSPACE;

        switch (n->tok) {
        case MDOC_Ao:
        case MDOC_Aq:
                term_word(p, n->child != NULL && n->child->next == NULL &&
                    n->child->tok == MDOC_Mt ? ">" : "\\(ra");
                break;
        case MDOC_Bro:
        case MDOC_Brq:
                term_word(p, "}");
                break;
        case MDOC_Oo:
        case MDOC_Op:
        case MDOC_Bo:
        case MDOC_Bq:
                term_word(p, "]");
                break;
        case MDOC__T:
                /* FALLTHROUGH */
        case MDOC_Do:
        case MDOC_Dq:
                term_word(p, "\\(rq");
                break;
        case MDOC_En:
                if (n->norm->Es == NULL ||
                    n->norm->Es->child == NULL ||
                    n->norm->Es->child->next == NULL)
                        p->flags &= ~TERMP_NOSPACE;
                else
                        term_word(p, n->norm->Es->child->next->string);
                break;
        case MDOC_Po:
        case MDOC_Pq:
                term_word(p, ")");
                break;
        case MDOC_Qo:
        case MDOC_Qq:
                term_word(p, "\"");
                break;
        case MDOC_Ql:
        case MDOC_So:
        case MDOC_Sq:
                term_word(p, "\\(cq");
                break;
        default:
                abort();
        }
}

static int
termp_eo_pre(DECL_ARGS)
{

        if (n->type != ROFFT_BODY)
                return 1;

        if (n->end == ENDBODY_NOT &&
            n->parent->head->child == NULL &&
            n->child != NULL &&
            n->child->end != ENDBODY_NOT)
                term_word(p, "\\&");
        else if (n->end != ENDBODY_NOT ? n->child != NULL :
             n->parent->head->child != NULL && (n->child != NULL ||
             (n->parent->tail != NULL && n->parent->tail->child != NULL)))
                p->flags |= TERMP_NOSPACE;

        return 1;
}

static void
termp_eo_post(DECL_ARGS)
{
        int      body, tail;

        if (n->type != ROFFT_BODY)
                return;

        if (n->end != ENDBODY_NOT) {
                p->flags &= ~TERMP_NOSPACE;
                return;
        }

        body = n->child != NULL || n->parent->head->child != NULL;
        tail = n->parent->tail != NULL && n->parent->tail->child != NULL;

        if (body && tail)
                p->flags |= TERMP_NOSPACE;
        else if ( ! (body || tail))
                term_word(p, "\\&");
        else if ( ! tail)
                p->flags &= ~TERMP_NOSPACE;
}

static int
termp_fo_pre(DECL_ARGS)
{
        size_t rmargin;

        switch (n->type) {
        case ROFFT_BLOCK:
                synopsis_pre(p, n);
                return 1;
        case ROFFT_BODY:
                rmargin = p->tcol->rmargin;
                if (n->flags & NODE_SYNPRETTY) {
                        p->tcol->rmargin = p->tcol->offset + term_len(p, 4);
                        p->flags |= TERMP_NOBREAK | TERMP_BRIND |
                                        TERMP_HANG;
                }
                p->flags |= TERMP_NOSPACE;
                term_word(p, "(");
                p->flags |= TERMP_NOSPACE;
                if (n->flags & NODE_SYNPRETTY) {
                        term_flushln(p);
                        p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND |
                                        TERMP_HANG);
                        p->flags |= TERMP_NOPAD;
                        p->tcol->offset = p->tcol->rmargin;
                        p->tcol->rmargin = rmargin;
                }
                return 1;
        default:
                return termp_bold_pre(p, pair, meta, n);
        }
}

static void
termp_fo_post(DECL_ARGS)
{
        if (n->type != ROFFT_BODY)
                return;

        p->flags |= TERMP_NOSPACE;
        term_word(p, ")");

        if (n->flags & NODE_SYNPRETTY) {
                p->flags |= TERMP_NOSPACE;
                term_word(p, ";");
                term_flushln(p);
        }
}

static int
termp_bf_pre(DECL_ARGS)
{
        switch (n->type) {
        case ROFFT_HEAD:
                return 0;
        case ROFFT_BODY:
                break;
        default:
                return 1;
        }
        switch (n->norm->Bf.font) {
        case FONT_Em:
                return termp_under_pre(p, pair, meta, n);
        case FONT_Sy:
                return termp_bold_pre(p, pair, meta, n);
        default:
                return termp_li_pre(p, pair, meta, n);
        }
}

static int
termp_sm_pre(DECL_ARGS)
{
        if (n->child == NULL)
                p->flags ^= TERMP_NONOSPACE;
        else if (strcmp(n->child->string, "on") == 0)
                p->flags &= ~TERMP_NONOSPACE;
        else
                p->flags |= TERMP_NONOSPACE;

        if (p->col && ! (TERMP_NONOSPACE & p->flags))
                p->flags &= ~TERMP_NOSPACE;

        return 0;
}

static int
termp_ap_pre(DECL_ARGS)
{
        p->flags |= TERMP_NOSPACE;
        term_word(p, "'");
        p->flags |= TERMP_NOSPACE;
        return 1;
}

static void
termp____post(DECL_ARGS)
{
        struct roff_node *nn;

        /*
         * Handle lists of authors.  In general, print each followed by
         * a comma.  Don't print the comma if there are only two
         * authors.
         */
        if (n->tok == MDOC__A &&
            (nn = roff_node_next(n)) != NULL && nn->tok == MDOC__A &&
            ((nn = roff_node_next(nn)) == NULL || nn->tok != MDOC__A) &&
            ((nn = roff_node_prev(n)) == NULL || nn->tok != MDOC__A))
                return;

        /* TODO: %U. */

        if (n->parent == NULL || n->parent->tok != MDOC_Rs)
                return;

        p->flags |= TERMP_NOSPACE;
        if (roff_node_next(n) == NULL) {
                term_word(p, ".");
                p->flags |= TERMP_SENTENCE;
        } else
                term_word(p, ",");
}

static int
termp_li_pre(DECL_ARGS)
{
        term_fontpush(p, TERMFONT_NONE);
        return 1;
}

static int
termp_lk_pre(DECL_ARGS)
{
        const struct roff_node *link, *descr, *punct;

        if ((link = n->child) == NULL)
                return 0;

        /* Find beginning of trailing punctuation. */
        punct = n->last;
        while (punct != link && punct->flags & NODE_DELIMC)
                punct = punct->prev;
        punct = punct->next;

        /* Link text. */
        if ((descr = link->next) != NULL && descr != punct) {
                term_fontpush(p, TERMFONT_UNDER);
                while (descr != punct) {
                        if (descr->flags & (NODE_DELIMC | NODE_DELIMO))
                                p->flags |= TERMP_NOSPACE;
                        term_word(p, descr->string);
                        descr = descr->next;
                }
                term_fontpop(p);
                p->flags |= TERMP_NOSPACE;
                term_word(p, ":");
        }

        /* Link target. */
        term_fontpush(p, TERMFONT_BOLD);
        term_word(p, link->string);
        term_fontpop(p);

        /* Trailing punctuation. */
        while (punct != NULL) {
                p->flags |= TERMP_NOSPACE;
                term_word(p, punct->string);
                punct = punct->next;
        }
        return 0;
}

static int
termp_bk_pre(DECL_ARGS)
{
        switch (n->type) {
        case ROFFT_BLOCK:
                break;
        case ROFFT_HEAD:
                return 0;
        case ROFFT_BODY:
                if (n->parent->args != NULL || n->prev->child == NULL)
                        p->flags |= TERMP_PREKEEP;
                break;
        default:
                abort();
        }
        return 1;
}

static void
termp_bk_post(DECL_ARGS)
{
        if (n->type == ROFFT_BODY)
                p->flags &= ~(TERMP_KEEP | TERMP_PREKEEP);
}

/*
 * If we are in an `Rs' and there is a journal present,
 * then quote us instead of underlining us (for disambiguation).
 */
static void
termp__t_post(DECL_ARGS)
{
        if (n->parent != NULL && n->parent->tok == MDOC_Rs &&
            n->parent->norm->Rs.quote_T)
                termp_quote_post(p, pair, meta, n);
        termp____post(p, pair, meta, n);
}

static int
termp__t_pre(DECL_ARGS)
{
        if (n->parent != NULL && n->parent->tok == MDOC_Rs &&
            n->parent->norm->Rs.quote_T)
                return termp_quote_pre(p, pair, meta, n);
        else
                return termp_under_pre(p, pair, meta, n);
}

static int
termp_under_pre(DECL_ARGS)
{
        term_fontpush(p, TERMFONT_UNDER);
        return 1;
}

static int
termp_abort_pre(DECL_ARGS)
{
        abort();
}